objective-c - 我需要在当前视图控制器中的标签栏上方弹出操作表，但它不应与标签栏重叠（我需要清楚地看到标签栏）

Question

我需要在当前视图控制器中的标签栏上方弹出透明操作表，但它不应与标签栏重叠（我需要清楚地看到标签栏）。

Answer 1

要在 UIActionsheet 上创建透明背景，您必须设置委托，然后您可以执行以下操作：

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
    [actionSheet.layer setContents:nil];
}

---

---

要创建一个从底部动画的自定义 UIView，你可以这样做>

bottomView = [[UIView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, 250)];
bottomView.backgroundColor = [UIColor redColor];
bottomView.hidden = YES;
[self.view addSubview:bottomView];

UIButton *testButton = [UIButton buttonWithType:UIButtonTypeCustom];
testButton.frame = CGRectMake(20, 50, 280, 40);
testButton.backgroundColor = [UIColor greenColor];
[bottomView addSubview:testButton];

[self animateBottomViewIn];

并有以下方法：

-(void)animateBottomViewIn
{
    bottomView.hidden = NO;
    [UIView animateWithDuration:0.3 animations:^{
        bottomView.frame = CGRectMake(0, self.view.frame.size.height - bottomView.frame.size.height, self.view.frame.size.width, bottomView.frame.size.height);
    } completion:^(BOOL finished) { }];
}

-(void)animateBottomViewOut
{
    [UIView animateWithDuration:0.3 animations:^{
        bottomView.frame = CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, bottomView.frame.size.height);
    } completion:^(BOOL finished) {
        bottomView.hidden = YES;
    }];
}